Home»Search by Sector of Activity: Commercial Heating, Ventilation & Air Conditioning Service Greater Montreal, Laval, Longueuil, South Shore and North Shore
18 sectors · Greater Montréal
Commercial HVAC · Updated October 14, 2026
Commercial air conditioning, ventilation and heating by sector of activityGreater Montréal, Laval, Longueuil, South Shore and North Shore. A restaurant does not breathe like a server room.
Temperature, humidity, fresh air, noise, refrigeration: every building has its own priorities and rules. Find your sector, compare, run your diagnostic and see the official numbers. 100 % free on-site quote.
20 °Clegal minimum for seated office work (RSST, Schedule IV)
18–27 °Crecommended server inlet range (ASHRAE TC 9.9)
90 %of eligible costs: the most Hydro-Québec pays on Rate G (Efficient Solutions)
18sectors of activity covered
15.8 · 15.10 · 16RBQ subclasses we hold
5 regionsMontréal, Laval, Longueuil, South Shore, North Shore
200+technical articles on our commercial blog
01 · Our commercial HVAC services
Our commercial HVAC services, sector by sector.
Tap a sector: its card shows what matters, its requirement profile, the official benchmark that applies and what goes to a licensed partner.
Offices and buildings · Card 1 of 18
Condo and co-ownership
Every condo is different. We install and maintain efficient heating and cooling, unit by unit or for the whole building, with ventilation designed for the common areas.
Requirement profile
TemperatureHigh
HumidityStandard
Fresh airHigh
NoiseCritical
RefrigerationStandard
What matters
Per-unit or central system, depending on the declaration of co-ownership
Outdoor units: location to clear with the syndicate and the municipal by-law
Corridors and common areas: ventilation and make-up air
Good to know. Each city and borough regulates where outdoor units can go. Our Permits and Regulations page covers it city by city.
A server room produces heat day and night. Constant cooling protects the equipment and prevents shutdowns: we install dedicated units with temperature alarms and redundancy.
Requirement profile
TemperatureCritical
HumidityCritical
Fresh airStandard
NoiseStandard
RefrigerationCritical
What matters
Continuous heat load, day and night, all year
Humidity limits: dew point and maximum RH
Redundancy so one unit going down does not stop the cooling
18–27 °C
Recommended equipment inlet range, classes A1 to A4; maximum 70 % RHSource: ASHRAE TC 9.9, 5th edition (2021)
Common equipment
Dedicated air conditionerCeiling cassetteCondensing unitTemperature alarm
Large data centre or high-density room: engineered design.
In a gym, temperature and humidity follow the crowd. Our systems control the heat, remove humidity and bring in fresh air while keeping energy use down.
Requirement profile
TemperatureHigh
HumidityCritical
Fresh airCritical
NoiseStandard
RefrigerationStandard
What matters
High internal loads at peak hours
Humidity to remove from studios and locker rooms
Locker rooms and washrooms vented outdoors
s. 111
Locker rooms and washrooms ventilated to the outsideSource: RSST, s. 111
Schools and universities need comfortable, well-ventilated rooms for students and staff. We manage temperature, humidity and fresh air, and schedule the work outside class time.
In a convenience store, customer comfort and product storage go together. We handle both the store’s air conditioning and the refrigeration of perishables.
Requirement profile
TemperatureHigh
HumidityStandard
Fresh airStandard
NoiseStandard
RefrigerationCritical
What matters
Display cases and walk-ins: the heat they reject warms the store
Low-GWP refrigerants required in new equipment
Clean condensers to protect the stock
GWP 1,400
Cap for commercial stand-alone medium-temperature units made or imported since 2020Source: SOR/2016-137, Schedule 1.1
Common equipment
Wall-mounted air conditionerCondensing unitWalk-in coolerTemperature alarm
In healthcare, HVAC goes beyond comfort. Designs follow CSA Z317.2; we carry out the ventilation, refrigeration and electrical work to those plans, and handle comfort in clinics and medical offices.
Requirement profile
TemperatureCritical
HumidityCritical
Fresh airCritical
NoiseHigh
RefrigerationStandard
What matters
Healthcare HVAC follows a dedicated standard
Pressures, filtration and air changes set by the engineer
Clinics and medical offices: comfort and ventilation in waiting rooms
Z317.2
CSA standard for HVAC in healthcare facilities, 2024 editionSource: CSA Z317.2:24, Standards Council of Canada
Common equipment
Ducted unitERVAir conditioningFiltration
Design to CSA Z317.2: engineer. We carry out the ventilation, refrigeration and electrical work to the plans.
Livestock barns, crop storage, greenhouses: every farm building has its own temperature, humidity and ventilation needs.
Requirement profile
TemperatureHigh
HumidityCritical
Fresh airCritical
NoiseStandard
RefrigerationHigh
What matters
Livestock barn ventilation: humidity and gases to remove
Crop storage: temperature and humidity
Equipment that stands up to dust and corrosion
Good to know. Propane or natural-gas appliances go to a contractor licensed in 15.6 or 15.2; we handle the ventilation, refrigeration and electrical work.
Six mistakes we often see in commercial buildings.
ScheduleCooling an empty space
With no programmed schedule, the unit cools evenings and weekends for nobody.
Make-up airExhausting without replacing
Exhausted air with no make-up air puts the space under negative pressure: heavy doors, odours, cold drafts.
ENERGY STARLosing the grant
A split heat pump without ENERGY STAR certification no longer qualifies for Efficient Solutions.
CertificateAn unqualified technician
Installing, repairing or recharging a halocarbon system requires the certificate set out in the regulation.
5 yearsA lost service log
The service log of a halocarbon system must be kept for 5 years. The owner gets a copy.
Too bigOversizing the unit
An oversized unit starts and stops constantly: humidity stays, wear speeds up.
10 · Frequently asked questions
Short answers to the questions we hear most.
My space has several uses. Which sector should I pick?+
Start with the main use, then look at the neighbouring sectors: a store with a warehouse in the back falls under both. During the visit, the estimator treats each zone according to how it is really used.
What temperature does the law require at work?+
The RSST sets minimums by effort: 20 °C for light seated work, 17 °C for light standing work, 16 °C for medium standing work and 12 °C for heavy standing work. It sets no maximum: heat is regulated as heat stress.
How often must ventilation be inspected?+
At least once a year. Section 104 of the RSST requires mechanical ventilation systems to be inspected and adjusted every year, with filters maintained or replaced.
What are the obligations for a commercial refrigeration system?+
For 20 kW and up: a leak test at least once a year, no more than 15 months apart. Only a certificate holder may install, repair, charge or drain the unit, and the service log is kept for 5 years.
Are there grants for a store or offices?+
Yes. Hydro-Québec’s Efficient Solutions covers up to 90 % of eligible costs for small businesses (Rate G or Flex G) and up to 75 % for medium and large ones. LogisVert is for residential customers.
Do you do gas, oil or boiler work?+
No. Our licences cover ventilation (15.8), refrigeration and air conditioning (15.10) and electrical work (16). Gas (15.2), oil (15.3) and hot-water heating (15.4) go to a contractor licensed in those subclasses.
Which construction code applies to my work?+
The 2020 NBC as amended for Québec has been in force since April 17, 2025. The 2015 edition can still be used for work started before October 17, 2027.
Rate G or Rate M: which one applies to me?+
Rate G is for accounts whose minimum billing demand is under 65 kW. Rate M applies from 50 kW of demand. Your Hydro-Québec bill shows your rate.
How much fresh air does an office need?+
Using the ASHRAE 62.1 office method: 2.5 L/s per person plus 0.3 L/s per square metre. For 25 people in 400 m², that is about 183 L/s, or roughly 387 cfm. The final airflow is set at design.
Are the refrigerant rules changing?+
Yes. Federally, commercial stand-alone refrigeration units have been capped at a GWP of 1,400 (medium temperature) or 1,500 (low temperature) since 2020, centralized systems and condensing units at 2,200, and chillers at 750 since 2025. The federal regulation sets no cap for comfort air conditioning.
Does the online diagnostic replace a visit?+
No. It gives you the rules and benchmarks for your sector. Equipment choice and sizing are done on site, free of charge, by an AirGreen estimator.
Which regions do you serve?+
Montréal, Laval, Longueuil, the South Shore and the North Shore. Our showroom is in Boucherville, at 1370 rue Joliot-Curie, unit 712.
No question matches. Try another word, or call us at 514 316-2973.
AirGreen · Commercial
One space, one visit, one clear plan.
An AirGreen estimator visits your building, looks at what is in place and gives you a written quote. The on-site estimate is 100 % free.
Regulation respecting occupational health and safety (RSST), chapter S-2.1, r. 13, s. 104, 111, 117 to 121 and Schedules III and IV — LégisQuébec, current to June 1, 2026.
Québec Halocarbons Regulation, chapter Q-2, r. 29, s. 22, 43, 44, 59 and 60 — LégisQuébec, current to June 1, 2026.
Ozone-depleting Substances and Halocarbon Alternatives Regulations, SOR/2016-137, Schedule 1.1 — current to September 21, 2026.
ASHRAE TC 9.9, Thermal Guidelines for Data Processing Environments, 5th edition (2021). ANSI/ASHRAE 62.1, Table 6.2.2.1, office space (addendum s to 62.1-2016, 2019).
Canadian Conservation Institute, Agents of deterioration: incorrect relative humidity and temperature (2021 and 2018). CSA Z317.2:24, October 31, 2024.
RBQ, Schedule II of the Regulation respecting the professional qualification of contractors (2024); notice of August 26, 2026 on the Construction Code transition period.
Hydro-Québec, Electricity rates as of April 1, 2026 and Efficient Solutions participation guides, March 2026. Gouvernement du Québec, ÉcoPerformance page of September 16, 2026.
Amounts and airflows shown are estimates; only the responsible organizations confirm the support granted, and only Hydro-Québec issues your bill.
Information intéressante pour vos travaux de Climatisation, Ventilation & Chauffage (CVC) Commercial